<!DOCTYPE HTML>
<canvas id="c"></canvas>
<script>
var ctx = c.getContext('2d');
ctx.scale(0,1);
ctx.fillStyle = "black";
ctx.fillRect(0, 0, 10, 10);
ctx.setTransform(1, 0, 0, 1, 0, 0);
ctx.fillRect(0, 0, 10, 10);
</script>
